package IO流案例;

import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;

public class 复制文件异常的处理 {
    public static void main(String[] args) {

    }
    /*try catch finally*/
    private static void method2(){
        FileReader fr=null;
        FileWriter fw=null;
        try {
            fr=new FileReader("fr.txt");
            fw=new FileWriter("fw.txt");
            char[] chs = new char[1024];
            int len;
            while ((len=fr.read())!=-1){
                fw.write(chs,0,len);
            }
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            if(fw!=null){
                try {
                    fw.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            if(fr!=null){
                try {
                    fr.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
    }

    /*抛出异常*/
    private static void method1() throws IOException {
        FileReader fr = new FileReader("fr.txt");
        FileWriter fw = new FileWriter("fw.txt");
        char[] chs = new char[1024];
        int len;
        while ((len=fr.read())!=-1){
            fw.write(chs,0,len);
        }
        fr.close();
        fw.close();
    }

}